Typewriting machine



Dec. 20, 1927.

A. G. F. KUROWSKI TYPEWRITING MACHINE Filegl Feb. 5, 1924 3 Sheets-Sheet 1 Dec. 20, 1927.

A. G. F. KUROWSKI TYPEWRITING MACHINE Filed Feb. 5, 1924 3 Sheets-Sheet 2 A. G. F. KURQWSK] Dec. 20, 192 7.

TYPEWRITING MACHINE Filed Feb. 5. 1924 3 Sheets-Sheet 5 w &

l t-iterated Dec. 20, 1927.

UNITED dTATES PATEN'E OFFIQE.

ALFRED G. F. KUROXVSKI, OF BROOKLYN, NEXV YORK, ASSYKGNOR 'I'O UNDERWOOD TYPE- VJ'RITER COMPANY, OF NEW; YORK, N.

Y., A CORPORATION OF DELA'W'ARE.

Application filed February 5, 1924.

This invention relates to ribbon mechanism tor typewriting machines, and more particularly to machines tor 'riting checks or similar instruments and for making a copy on a continuous rccorthshcct ot' a part of the matter typed on each check ot a series.

In writing a check. it is customary to insert it in the typewriter and type a plurality of lines upon it. The first line consists of the name of the payee and the numerals indicating the amount for which the check is drawn, and the other line or lines include a statement of the amount l or which the check is drawn, spelled out in tall, and possibly other data. It is desirable to keep a condensed record of the checks by copying on a record-sheet the first typewritten line only of each check. With this end in view, there is provided, in addition to the usual ribbon mechanism for writing on the faces of the checks, an auxiliary ribbon behind the checks but in trout ot the record-sheet, and

. mechanism is also provided to move the auxiliary ribbon to and from ctlective position atthe will of the operator. The auxiliary ribbon not only makes the condensed record of the checks. but it also prints upon the racks of the checks, which is advantageous, since an alteration of a check, to escape detection, requires that erasures be made at the same point on the front and back of the check, and this without making a thin spot which would be noticeable when the check is held up to the light.

In accordance with one feature of the invention, provision is made of a manually operable handle arranged to be etlective when moved in one direction to raise the auxiliary ribbon frame and thereby to move the auxiliary ribbon to ineffective position, and to be effective at a single stroke when actuated in the reverse direction, to perform the dual "function of feeding: the auxiliary ribbon and of restoring it to effective posi tion.

It is an important feature that such actuation of the handle causes the ribbon to be first ted while in its ineffective position and to be thereatter moved to its e'ltcctive position. whereby the likelihood oi? smearing the work by such ribbon-feedingis avoided. To this end the ribbon-feeding mechanism is mounted upon the auxiliary ribbon frame to swing as a unit therewith. so that the ribbon Serial No. 690.705.

may be fed while in its inettective position, and the ribbon is arranged to be fed by a movement of the Feeding mechanism relative to the ribbon :tranie. Provision is made of detent means for yieldingly holding the ribbon trame in inellective position, said means being powerful enough to prevent movement of the frame toward effective position until the ribbon-tecding mechanism has been moved relatively to the frame to. feed the ribbon. i

' The handle and the mechanism operated by it are so arranged that the handle may also be operateiil to teed the ribbon when the ribbon is in its etl'ective position, without moving it from said position. The ribbon may therefore be fed at the beginning of each line in which it is to be used, even though the work is of a character to cause such lines to occur in succession.

A further feature of the invention relates to novel ribbon-reversing mechanism of a very simple and etiicient character. The ribbonspools at the opposite ends of the platen may be driven for feeding the ribbon in opposite directions by ratchet-wheels at tached to them. and these are driven by feedpawls arranged to be reciprocated by a rockshalt that is connected to the ribbon-feeding ha udle and extends trom side to side of the auxiliary r bbon frame. A ribbon-reversing shalt also extends across the auxiliary ribbon :lrame. and has projections or cams arranged to be brought alternatively into iengagement with the 'tced-pawls simply by .movcn'ient ot a reversing handle to rock the reversingshaft, the arrangement being such that the teed-pawl which is engaged by its associated projection on the reversing shaft is rendered inoperative.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figurel is a plan view of a part of a typewriting machine ha ving the present improvements applied thereto.

F a'ure .2 a front elevation of the same.

Figure 3 is a sectional side elevation as seen 'lrom the right end of the machine. showing; the auxiliary ribbon effective and the parts in normal operative position. The position ot the ribbon raising and "Feeding handle when moved to teed the ribbon is indicated in dot-and-dash lines in this figure.

anisni reversed.

Figure 7 is a fragmentary sectional detail top plan View, showing;- the mounting oi the auxiliary ribbon frame andussociated mech anism.

Fl ure 8 1511. aer's JectIWe View of a trio tlon spool-retarding device.

Figure 9 1s a perspective View, partly broken away, 01 the auxiliary ribbon frame,

showing particularly the details or construction of the riobon'ieeding mechanism and the ribbon reyersing mechanism.

Figure 10 is altransverse vertical section through the left ribbon-spool andassooiated parts.

The typewriting machine to which the present improvements are applied is provided with the usualmain ribbon 10, which is fed back and forth between spools (not shown) and is threaded through a ribbon-vi brator 11 between a type-guide (not shown) and a platen 1.2 in position to be struck by types 13 l inal-ring impressions on the paper in the machine. The platen 12 is rotatably mounted by means of a platen-axle l l iournaled in a platen-frame 15 in the usual manner. Paper-teed-rolls l6 co-opcrate with the platen for feeding the checks and a record sheet line by line, and may be cast off by means (not stream) of the kind usually provided in Underwood typewriters.

An auxiliary ribbon 17 arranged, to pass between the main ribbon 10 and the platen 12 to print upon the face of the recordsheetand upon the back of the check is carried by spools 18, which, together with ribbon operating and controlling 1113Cl1l11l5111,l10 mounted upon an auxiliary ribbon frame comprising end plates 19 and 20 and a connecting roclrshait journaled in brackets recur-ed to the end 23 of the platen traine.

The auxiliary ribbon 17 extends forward "from each of the spools 18 over a guideroller 24-, through an inclined ribbon-guide slot 25 at the front of the end plate on which the spool is mounted, and thence across the front of the platen through a cor responding guide slot 25 at the opposite side of the machine.

Eachot' the auxiliary ribbon-spools 18 is mounted for rotation about a horizontal shaft 26, supported in a hub cap 27 secured to one of the end plates 19, 20. The spool 18 is retained upon the shaft 26 by a spring nee ribbonspool 18 is removed from the shaft.

u ion it a handle e3 for f ooding the aunili r brake 28 and a knurled nut 29 threaded onto a reduced end portion 30 of the shaft that presses the spring brake 28 lirnily gainst the side of the ribbon-spool 18. The pressure of the brake 28 can be adjusted by turning the nut 29 to adjust the retardation etfeoted by the brake and thus control the tensiouo'f the ribbon 1'4. ll ratchet-wheel 31 is also rotatable upon the shaft 26, said :iatchet-wheel being spaced troin the spool 18 by a washer on the f-lllfl'll' and having driving connection with the spool through a pin 33 on the ratchet-wheel 3i that fits into-a recess in the spool 18. The ratchet-- wheel 31 has a hub portion 35 that e::- tends through the end plate on which it inounteth snugly fits within the hub cap 2? for rotation relatively thereto, and forms an extended support for the shaft it screw 36, threaded into an end of the shaft 26, re tains the shaft in position in the hub cap 2'? and also secures in place an elbow-springmember 37 which bears upon a finger 38 that-- extends through the side of the hub cap and rides in a circuiniterential groove 39 of the ratchet-wheel hub 35 to detain the ratchet wheel 31 in place on the shaft 26 when the n ch ot the end plates 19 and 20 is L to a bushingell), and each l'uishing' 10, in turn, is made fast by a pin 41 to the rock-shaft 21. A hub e2, journaled on. the bushingatl at the right end of the rocloshaft 21, has

ribbon 1'? and for raising the auxiliar' riobon to lneli eotive position by 1116Cl11111$-1111 to be described.

The handle 43 has a limited free 'lllOVG- nient ri-ilative to the auxiliary ribbon frame for feeding the ribbon 17, it being arranged to be depressed to teed the ribbon, and to be restored to normal position relative to the auxiliary ribbon frame by a spring el l con 'nected to-a pin &5 on the handle and to a pin. 4E5? on the inside of the end plate 26, the pin 45 extending through a slot 4L6 in the end plate 20. A screw l'i", projecting from the outeritace of the end plate 20, is position ed to engage the handlelffi to determine the normal position of the handle 42.} relatire to the end plate in itsnorinal position.

/Vhen the handle ill is raised. from the full line position of l igure 3 to the position of Figure 4:, it acts through the pin and the screw 4? to turn theauniliaiy ribljion frame about the axis of the rock-shat't 21 and thereby to lift the auxiliary ribbon 17 to an ineffective position.

For determining the normal and inel'lective positions of the auxiliary ribbon l? and for detaining it in either ot such position, there may be lifted upon each of the bush ings 40 a hub 48 having a cam nien'iber 49 fast upon it. These cam inen'ibers 4:9 at the opposite ends: of the shaft 21 actin unison,

and each comprises an upper recess and a lower recess 51 with an intervening projection 52 for co-operating with a detent-roll 53 carried by an arm 5% pivoted on one of the brackets 22 and urged toward the cam 49 by a spring 55 connected to the arm 51 and to the bracket 22. The lower recesses 51 co-operate with the detent-rolls 53 to detain the auxiliary ribbon frame yieldingly in its normal position, while the upper recesses 50 co-operate with the detent-rolls to detain the auxiliary ribbon frame in its raised position.

hen it is desired to lower the auxiliary ribbon 17 to its effective position, the handle 13 is depressed from the position shown in Figure 4C. The detent-rolls 53 at first prevent rotation of the auxiliary ribbon frame while the pin 15 travels from the forward end of the slot 46 to the rear end thereof, and it is during this time that the feeding of the auxiliary ribbon 17 is effected, as will be explained presently. After the engagementof the pin is with the rear end of the slot 46, the auxiliary ribbon frame moves in unison with the handle 13 to effective position, the detent-ro1l 53 being forced outward from the recess 50, over the projection 52, and seating again in the reces 51.

The handle 43, as has been stated, serves not only to move the auxiliary ribbon frame between effective and ineffective positions,

but, in the movement from ineffective to effective position, it also acts to feed the auxiliary ribbon 17 to bring a fresh portion thereof to the writing position. For this purpose, the handle 43 has a rearwardly-extending arm 56 which is connected by a pin 57 and crank 58 to a hollow shaft or sleeve 59 rotatably mounted on the rock-shaft 21 and extending substantially the full distance between the end plates 19 and 20. At its left end the hollow shaft 59 is connected by means of a crank 80 and pin 61 to a disk 62 fast to a hub 63 on the left bushing 10. The handle 13 has pivoted upon it a feed-pawl 6-1 for co-operation with the ratchet-wheel 31 that drives the right ribbon-spool 18,

' while the disk 62 has pivoted upon it a similar pawl 65 for co-operation with the ratchet-wheel 31 that drives the left ribbonspool 18, said pawls 6-1 and 65 being urged toward their respective ratchet-wheels by springs 66 coiled around the pivots of said pawls. It will be evidentthat during the time when the handle 43 is moving in a counterclockwise direction (as viewed in Figure 3) relatively to the auxiliary ribbon frame. the pawls (it and 65 will be rocked forward relatively to the ratchet-wheels 31, and that either of them, if permitted to eugage its ratchet-wheel, will rotate the ratchet-wheel to effect a feeding movement ofithe auxiliary ribbon 17.

Provision is made of means for controlling the pawls (vi and (35 to cause them to he alternatively and selectively ellective. F or this purpose, a rock-shaft 67, journaled in the end plates 19 and 20, has fast upon it a cam 68 for engaging the tail er of the pawl (it. to hold it out of engagement with its ratchet-wheel 31, and a second cam (59 for engaging the tail 65 of the pawl 35 to hold it out of engagement with its ratchet-wheel 31. The tails of the pawls 64.- and 65 have cam surfaces 70 upon them for ei'igaging the cams 68 and (19, and these cam surfaces are designed to *ause the disengaging cams ($8 and 69 when effective to maintain their respectiw pawls (it and 65 out of reach of the ratchet-wheels 31 throughout their full movements. The cams 63 and 69 are aranged in different angular positions on the rock-shaft 67. so that in one position of the shaft the cam 63 will be effective and the cam 69 will be ineffective, while in another position of the shaft the reverse will the true. The shaft 67 is yieldingly detained in either of said positions by means of a spring-detent 71 that bears against flats 72 and 73 on the shaft. The shaft 67 is arranged to be. rocked bet ween such positions by a reversing handle T l, journaled on the hub cap 27 of the left end plate and connected to the rockshaft 67 by a link 7 5 and a crank-arm 76 fast on the shaft 67. The reversing handle 7 has an arcuate slot 77 in which a screw 78, threaded into the left end plate 19, is rc ceived to limit the movement of the reversing handle by engagement with the ends of the slot.

Back-stop pawls T9, mounted to swing about the axis of the rock-shaft 21 and urged toward the ratchet-wheels 31 by springs 80, serve to prevent retrograde movements of the ratchet-wheels. Each of these pawls 79 is located to be engaged by the feed-pawl of its ratchet-wheel and to be moved to and maintained in an ineffective position by said feed-pawl when the latter is thrown out of operation by the reversing mechanism.

It will now be understood that when the handle 13 is raised to move the auxiliary ribbon frame to ineffective position. the ribbonsfccdiug mechanism merely moves in unison with the auxiliary ribbon frame without affecting the feed or the tension of the ribbon 17. but that during thefust part of the downward movement of the handle 13, that is, while the pin 45 is moving from the front end of the slot 1-6 to the rear end thereof, the auxiliary ribbon-spool 18 whose feedpawl is effective is rotated to feed the ribbon. The continued downward movement of the handle 13 returns the auxiliary ribbon frame to effective position.

The ribbon 17 may also be fed without elevating the ribbon frame, merely by depress ing the handle 43 from the full-line position said figure.

shoe

I frame ITlOllD E/ECi of Figure 3 to the dotted-line position of When the ribbon 17 has heel tullywoiuid onto one of the i'ihhoi -SPOO1S 18, the reversing handle *1; he moved l to reverse the directed ol lie the 3'li) ho but this will not other ribbon iiieehmiisu'i.

mode of operation of the Vm'W'io may il resorted to within the eeope ot' the invention, and portions of the "ill'lpi'G'veliltiliS may lie-used without others.

us; to

chine having a @011 :11

J15; disipoeing an noon on insi e eum sheet, in

hon hi. i V .1 etl'eetii'e pouttlone, and hem 1iivouiitmith:

will the opei'izti meme to iziove the m.

iiie pos tion, v.) .:.eed i Q. it g jiewi'itiiig mo tioii with 7 taliti It said i'ihliomiiiovie17;

JililtlTfJ iibbOll.

hieuiio to selectively um i.

,-j 'd ribbon. in e with EQlti3l011 to instrumeii ii hon and mechanism o ieisiued by mid i'ihhoiination with :1 ti'iiveliuo eui'i'izuie i 1 i P i mole pleren ouruuieo they 21, o: 21 i'il'mou i'i'ziii'ie 1'1 minted on the cnvii'iogie for pivotal uiovei'iient ahoii on llllifl "pzliiliiti to the iii-tie oi the pinion, d i' hhou (to, ed hv mid tr'iii'iio, lli')i)3i1 .edii'ip: lIlQCllL'illSU! iiiz-hidihg SPnolQ i'rxi'i'i *hy Quid mine and iudeiieuoout ot the pivot of said frame. a haiidte. and i'iti-- hon-feeding eomieetiou' oh s? l'ioth the handle Psi-d the co mounted eonoeiitrfczill v wit ribbon home, the riliho'i-toe extending from saie ti'eu'ie hon-spools.

In :1 typeivi'itiue; machine, he tion with a traveling; caiuiog'e and hle platen joui'iflled therein, (it

on the eziiuirii 'e eoiuhiiiziii revohi a, i'ihhoii i-ihhom utiect the f ()llLSltiP the ifihhoii-ieedingl; D'lECiflzllliSln and the ribi i J instrumental tie, Offt 1] kihoirtoire-operate therewith, thou IilRIHQ Ciil'l'jlllifi the ribbon, 1f1lJbOIlthe ribbon and the iihhoii i o move the ribbon uni; 3H :ihout S'Iid p"- TIORH iii eetii'c po Lou and at the same time to meuitzi n t ie normal, LQii'it'llJIlSlllP ,oding meet eiiisni.

u iaeh me, the combitiie ribbon and its in ii ty 'iewi'it n- H2 .11 of e ilhiJOl'l ppoiftiiipfiifiuiie, a ribl' -si1u oi, :1 elia'it to suppa t studrihhonrihhoiiateeding' means, no; 11183118 including a 1* i; eizehie to TWO poeitioiis, means it; to (and nch-shod, said lest-named Ll i WQETHS including aurecipi'oerihle finger-piece, m to pivotully support said ZiiligGlFPiQCG mi the ribbon-spool mutt, an arm on said. a'oi-iit-mlizit't, a link connecting; arm with iii er-piece, and-:1 stop to limit the movement of the fingei piece in both dimo- -1 to locate the i'oelI-ehiift in its proper ,-::si'itions, and ii deteut to hold said rockelm ineither ot-ite pijisitione.

iii a typewritiug machine, 21 irihhoiifeeding mechanism including; a mounting plate, :1 huh fuel; to said plate and having an RXlUzi lJOIG and :1 lioie through its Shell ad acent said plate, :1 ItliiCllGiFWiWGi, 2i hub 18% to said ratchet-Wheel and engaging in the bore of said mounting-plate huh, and having an annular groove in its periphery which registers with said hole in the shell :anid

of said mounting-plate huh, a pin passing having; a circular extension associated therewith, a hmekebpliite to support said spool, a huh on said plate to I'QCQPFQ Said extension, it p111 in said huh extending toward the center thereof and hearing fi-Q'fldHSt said extension, and a spring to press said pin against SflICi extension.

mechanism including a shaft, i ratchet-- Wheel arranged with e huh portion for ro- 10. In :1 'typewiitiiig machine. a 'rihhon wheel, means for retaining the ribbon-spool in place on the shaft alongside the ratchet-- wheel, and means for retaining the ratchet wheel in place on, the shaft when the ribbonspool is removed therefrom, the ratchet:

wheel-retaining means including a springpressed part bearing on said ratchet-wheelhub and tending to retard the rotation of the latter and said ribbon-spool.

11. In ,a typewritingmachine, the combination with a platen and a platen'frame, of

a :unitary auxiliary ribbon device including a, pair of :detachabie mounting plates, one at each, end of said platemfranie, a rod fastened bet-ween said plates, a ribbons-frame supported on said rod and; carrying angauxiliaryribbon :to CO-OPQIQIQWVltll saidpla'ten,

means, for, swinging said ribbon-frame aboutsa d rodbetween effective and ineffecs tive i-positions, a-,,ribbon-feeding mechanism supported on saidrod, and a ribbon-revers- Y mg mechanism supported on said mounting plates in-the rear of said rod.

12. Ina typewriting machine, the combination with a platen and writing instrumentalities, of a ribbon to co-operate therewith, a rod, a ribbon frame supported on said rod and on which the ribbon is n1ounted, means for swinging the ribbon frame to move the ribbon to ineffective position, and ribbon-feeding mechanism also mounted on said rod to swing in unison with the ribbon whenthe latter ismoved to ineffective posi tion.

13.,In a typewriting machine, the cone bination with a main ribbon, of an auxiliary ribbon, means for rendering the auxiliary, ribbon ineffective at the will of the operator, ribbon-feeding mechanism, a hani dle operable to actuate the ribbon-feeding mechanism: to feed the auxiliary ribbonwhen said ribbon is in effective position, and

meansoperable by said liandleto move the auxiliaryribbonfrom ineffect ve liO'QflEClIlVG position.

14. In a ,typewritingmachine, the. combi, nation of aa'ibbon-supporting frame, ,IllJw hon-spools on said frame, ribbon-feeding bon-feed-reversing means including a rockshaft settable. to two angular positionston render-either pawl effective while the other pawl ,isbeing rendered ineffective, means to turn said rock-shaft, pivoted back pawls,

one for each ratchet-wheel, and springs to holdsaid back pawls vin engagement with said ratchetswheels, the forward ends of said feed-pawls-engaging with said back pawls adjacent their pivots, so thatwhen .eitherifeed-pawl isswung out of efiective cluding ai-pairaof ribbon-spools, one at each side vof the carriageand onto; which a rib-. boniis alternately wound, a late ally-disposed rod, a pair; of ratchet-wheels, each connection,

ratchet-wheel; having driving with one of the spools,,a pair ofpawls, one for each ,ratchetswheel to feed 1t step by step, means including reeiprocable flange members supported on said. rod; and ,on

which, the .paivls are carried and whereby they, are rec procated 1n unison-ltonactuate 7 the ratchet-wheels and feed the ribbon, an d reversing -meehanism including a rotatable rock-shatt igand, cams thereon to lengage (the pawls: and rende mtheni ineffective. alter natelyi:

lB-ainLa;typewriting machine hanvingqa mecha m. n

carriag 'ribbonrf etl ng said carriage;including a pairi'of ribbon; spools onto.1 which a;rib,bon is alternately wound, apair of ratchet-wheels, each ratchemvheel, having driving connection with OILOjOf the spools, a rod parallel with said ribbonin the rear thereof, a pair of pawls, having rearwardlysextending tail portions, one pawlfor each ratchet-wheel to. feed it step by step, and reciprocable member-soon said rod on; which the pawls are carried and whereby they are reciprocated in unison, Larock-shaft in the rear of said of ribbon-spools :onto which the ribbon i5 alternatelywound, a pair of ratchet-wheels,

each ratehet-wheel havingdrivingconnectionrwith one of thevspools, a pair ;of pawls, onefor each,ratchet-wheel to feed it step by step, and a reciprocable frame on which the pawls are pivotedeand whereby they are re-- v ciprocated in, ,unison; and reversing mecha nism including a rock-shaft extending parallelto tllQQDlVOlZSOf the pawls and arranged toone side thereof, disabling cams on said rock-shaft to engage the pawls and render them; inoperative alternately, and cam-surfaces onthe pawls for eo-operation with the disabling cams, said surfaces being arranged I on the same s de of the pivots, and the cams on the rock-shaft being offset circuinferem tially, so that a pawl held initially out of engagement with its ratchet-wheel by its ,disabling cam will be rendered effective while the other pawl is being rendered ineffective.

18. In a. typewritingl-machine, a-.ribbonion rod, apairaof pawl-disengaging.cams on the rock-shaft, one ,for (BO-0136111131011, with each feeding mechanism including a laterallydisposed rod, a rocking frame pivoted about said rod, a pivot-pin oscillatable about said rod, a feed-pawl on said pivot-pin, a ratchet wheel on said frame arranged to be fed step by step by the feed-pawl, a ribbonspool on said frame driven by the ratchetwheel to feed a ribbon, and a back-stop pawl to prevent retrograde movement of the ratchet- Wheel, said back-stop pawl being pivoted concentrically with the rocking frame and therefore relatively stationary during the reciprocation of the feed-pawl.

19. In a typewriting machine, in combination, a ribbon, ribbon-feeding mechanism, and ribbon-reversing liiGCllZllllSl'l'l comprising a rock-shaft and mechanism carried thereby effective in one pOSltiOD to cause the ribbon to be fed in one direction and in another po sitionto cause the ribbon to be fed in the opposite direction, a handle to operate said roclr shaft, means to engage said handle for positively arresting the movement of the rock shaft in said positions, and means on said rock-shaft fonyieldingly detaining the rock-shaft in said positions.

20. in a typevvriting machine, in combination, a ribbon, a ribbon frame swingable to move the ribbon between effective and in effective positions, ribbon-feeding mechanism, ribbon-reversing mechanism carried by said. frame, comprising a rock-shaft, means for detaining the rock-shaft in a position to cause the ribbon to be fed in one direction, and in another position to cause the ribbon to be fed in the opposite direction, ahandle carried by the ribbon-frame and connected to the rock-shaft for moving it between saidtWo positions, and means to limit the extent of movement of the handle to arrest it in one direction when the reel;

shaft has reached one of said positions and in the other direction when the roclnshaft has reached the other of said positions.

21. In a typewriting machine, the combination of a ribbonsupporting frame including two end plates, a rod connecting said end. plates to each other, feed it echanism including ratchetwheels, one at each side of said frame, pawls to engage said ratchet- Wheels, one at a time, rcciprocatory supports for said pavvls, said supports being mounted on" said rod and located outside of the end. plates, connectii'ig means between said pawlsupports, said connecting means including;- a sleeve on said rod, said sleeve being located between said end plates, arms on said sleeve, and lateral extensions connecting said arms with said pawl-supports, said lateral extensions being locatedbcyond the edges of the end plates, and means to reciprocate said supports to feed the ribbon.

22.111 a typewriting machine, in combiu: 1- tiou, a ribbon-carrying frame, acti ating means to operate said frame to render the neeaeea ribbon effective and ineffective, detent means to hold said frame either effective or ineffective, and. ribbon-feeding mechanism, said actouting means having a movement inde pendent of the ribbon-frame to actuate the ribbon-feeding mechanism while the ribbonframe is held by said detent means, said actuating means being subsequently effective to actuate said ribbon-frame.

in a typewritin g machine having a platen-frame, in combination, two mounting plates on said plateirframe, a rock-shaft between said mounting plates, a frame including plates fastened to the roclnshaft for ring a ribbon, a handle for rocking the -raft to move the ribbon to effective or I tive position, notched elements fixed to the rock-shaft, spring-pressed detents on said mounting plates to co-operate With the notches in said elements to retain the rib bon in its effective or ineffective position, and stops on said. notched elements to cooperate with said etents to prevent overthrow of the ribbon-frame when said frame operated by said handle.

24;. In a typevvriting machine havinga en-frame, in combination, a rod disposed between the ends of said platen-frame, a reciprocable ribbon-carrying frame pivoted on said rod to move the ribbon to and from effective position, ribbon-feeding mechanism on said rod, a pivoted handle for opcinting the ribbon-feeding mechanism and for movii the ribbon-frame to maize the ribbon ef- Je or inelfective, a'lostanotion connection between the handle and said ribbon frame, and means yicldingly detaining the ribbon-frame in its ineffective position While said handle is being operated and until the feeding of the ribbon has been substantially completed.

2". In a typewriting ,i'nachine, the coinbination witha platen and Writing instruh'ientalities to print through a ribbon, of

means to move said. ribbon to and from of fective position adjacent the platen, and

means operable at a single stroke to feed the ribbon Whilein its ii'ieffective position and then to move the ribbon toward the platen to its effective position after the ribbon-feeding has been substantially completed.

26. In atypevvriting machine, the combination With a platen-frame, of an auxiliary ribbon mechanism including detachable mountingplates on said platen-frame, a rod between said plates, an auxiliary ribbon carrying frame on said rod reciprocable between positions to make the ribbon effective and ineffective, ribbon-feeding instrumentalities on said rod, a rotatable shaft in the rear of said rod. ribbon-reversing instrumentalities on said shaft, andmeans carried by said mounting plates for latching the ribbon-frame in ineffective position a short distance above the printing line, said rod and said shaft engaging with said mounting plates so as to brace said auxiliary ribbon mechanism and permit it to be readily at tached or detached as a unit.

27. In a typewriting machine, the combination of a ribbon-supporting frame including two end plates, a rod connecting said end plates to each other, feed mechanism including ratchet-wheels, one at each side of said frame, pawls to engage said ratchetwheels, one at a time, recil'irocatory supports for said pawls, said supports being mounted on said rod and located outside of the end plates, connecting means between said pawlsupports, said connecting means including a sleeve on said rod, said sleeve being located between said end plates, arms on said sleeve, and lateral extensions connecting said arms with said pawl-supports, said lateral extensions being located beyond the edges of the end plates, means to reciprocate said supports to feed the ribbon, ribbon-reversing means including a rock-shaft, a finger-piece to reciprocate the latter, tails on said pawls,

and cams on said rock-shaft to engage said axial bore and an annular groove in its .outer periphery, a mounting plate adjacent said ratchet-wheel, a hub fast on said mounting plate and having an axial bore to receive said ratchet-wheel hub, and having a hole through its shell registering with said annular groove, a stub-shaft having a flangeportion disposed adjacent one end and arranged lor fitting snugly in said mounting plate hub, and a l'iody-portion arranged for said ratchet-wheel hub to engage therearound. a screw extending through the end of said mounting-plate hub and threaded into the end of said stub-shaft for holding the latter fast to said mounting-plate hub and against rotation, a pin extending through the hole in said mounting-plate hub and resting in said annular groove to retain said ratchet-wheel in place, a spring releasably held by said screw and engaging said pin to press it against said ratchet-wheel hub, and a ribbon-spool on said stub-shaft operatively connected to said ratchet-wheel.

29. In a typewrit-ing machine, a ribbonspool-drive mechanism including a ratchetwheel, an axle disposed adjacent said ratchet-wheel and parallel to the axis thereof, a member on said axle mounted for rotation therearound, a driving pawl pivoted on said member for engaging the teeth of said ratchet-wheel, and a back-stop pawl pivoted on said axle and disposed so that the back side of the front end of the drive pawl is in close proximity to said back-stop pawl intermediate its front end and said axle, whereby a small rotary movement of said drive pawl about its pivot will move said back-stop pawl to inettective position.

ALFRED G. F. KUROWSKI. 

